The level of empathy that Hoffman proposed in which children become increasingly aware of how others feel and that other people's perspectives and feelings may be different from their own is

An important aspect of problem representation is ______

a. proper categorization of the problem b. choice of a decision-making strategy c. use of an algorithm d. conceptual relativity

AIDS is caused by

a. the human immunodeficiency bacteria b. the AIDS bacteria c. the human immunodeficiency virus d. the human T-cell virus